Customized version of http://www.thingiverse.com/thing:493228

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=493228

Using the following options:

cellheight = 3
cols = 15
cellrad = 6
cellthick = 0.8
rows = 10
overlaptype = yes
celltype = open